PerfAnal is a GUI-based tool for analyzing the performance of applications on the Java 2 Platform. You can use PerfAnal to identify performance problems in your code and locate code that needs tuning. The PerfAnal tool simplifies this analysis in two ways:
You can obtain the PerfAnal.jar here: http://developer.java.sun.com/developer/technicalArticles/Programming/perfanal/PerfAnal.jar